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Loss of Carlin Tags from Walleyes
Author(s) -
Kallemeyn Larry W.
Publication year - 1989
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8675(1989)009<0112:loctfw>2.3.co;2
Subject(s) - stizostedion , national park , fish <actinopterygii> , population , fishery , biology , statistics , ecology , demography , mathematics , sociology
The annual rate of loss of Carlin tags was estimated as part of a population evaluation of walleyes Stizostedion vitreum of Kabetogama Lake in Voyageurs National Park, Minnesota. An estimated annual tag loss rate of 24.2% was determined from 1,796 and 2,498 walleyes that were both tagged and fin‐clipped in 1984 and 1985, respectively. A correction for the observed tag loss rate increased the estimate of first‐year exploitation of age‐3 and older male walleyes by 27%, from approximately 0.19 to 0.24; increased the estimated survival rate from 0.35 to 0.44; and decreased the estimate of population size by approximately 8.5%. These results illustrate the importance of assessing tag loss when important population statistics are estimated through the use of external fish tags.